I had some spacers on some Prime wheels that have a bit of positive offset (20) on my 280ZXT. amd believe me - you want spacers that EXACTLY match your lug pattern or you will rue the day you bought tje spacers.
I am talking vibration problems out the ying yang...
Not only that, but if you are laking only about 1/4" spacers, you have to change the studs - there isn't enough there for the spacer AND a good grip for the lug nuts - take ity from one who has had to be towed when a wheel ALMOST came off.
I bought the above Prime wheels and put 225/60/16's opn the rear, and 205/55/16s on the front and a couple of days later the spacers that were ordered for me (the insode of the tires were close to struts) came in - they installed the spaceres and 2 days later I almost wrecked the car when on of the wheels almost came off).
The people that installed everythin paid for the towing, I paid for new studs, but never liked the spacers.
I am now running 14x7" Western Cyclones on the car (daily driver and I care about ride) and am happy as a clam.